/lib/live/boot/9990-networking.sh is in live-boot 3.0.1-1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 | #!/bin/sh
#set -e
do_netsetup ()
{
modprobe -q af_packet # For DHCP
udevadm trigger
udevadm settle
[ -n "$ETHDEV_TIMEOUT" ] || ETHDEV_TIMEOUT=15
echo "Using timeout of $ETHDEV_TIMEOUT seconds for network configuration."
if [ -z "${NETBOOT}" ] && [ -z "${FETCH}" ] && [ -z "${HTTPFS}" ] && [ -z "${FTPFS}" ]
then
# support for Syslinux IPAPPEND parameter
# it sets the BOOTIF variable on the kernel parameter
if [ -n "${BOOTIF}" ]
then
# pxelinux sets BOOTIF to a value based on the mac address of the
# network card used to PXE boot, so use this value for DEVICE rather
# than a hard-coded device name from initramfs.conf. this facilitates
# network booting when machines may have multiple network cards.
# pxelinux sets BOOTIF to 01-$mac_address
# strip off the leading "01-", which isn't part of the mac
# address
temp_mac=${BOOTIF#*-}
# convert to typical mac address format by replacing "-" with ":"
bootif_mac=""
IFS='-'
for x in $temp_mac
do
if [ -z "$bootif_mac" ]
then
bootif_mac="$x"
else
bootif_mac="$bootif_mac:$x"
fi
done
unset IFS
# look for devices with matching mac address, and set DEVICE to
# appropriate value if match is found.
for device in /sys/class/net/*
do
if [ -f "$device/address" ]
then
current_mac=$(cat "$device/address")
if [ "$bootif_mac" = "$current_mac" ]
then
DEVICE=${device##*/}
break
fi
fi
done
fi
# if ethdevice was not specified on the kernel command line
# make sure we try to get a working network configuration
# for *every* present network device (except for loopback of course)
if [ -z "$ETHDEVICE" ]
then
echo "If you want to boot from a specific device use bootoption ethdevice=..."
for device in /sys/class/net/*
do
dev=${device##*/}
if [ "$dev" != "lo" ]
then
ETHDEVICE="$ETHDEVICE $dev"
fi
done
fi
# split args of ethdevice=eth0,eth1 into "eth0 eth1"
for device in $(echo $ETHDEVICE | sed 's/,/ /g')
do
devlist="$devlist $device"
done
# this is tricky (and ugly) because ipconfig sometimes just hangs/runs into
# an endless loop; if execution fails give it two further tries, that's
# why we use '$devlist $devlist $devlist' for the other for loop
for dev in $devlist $devlist $devlist
do
echo "Executing ipconfig -t $ETHDEV_TIMEOUT $dev"
ipconfig -t "$ETHDEV_TIMEOUT" $dev | tee -a /netboot.config &
jobid=$!
sleep "$ETHDEV_TIMEOUT" ; sleep 1
if [ -r /proc/"$jobid"/status ]
then
echo "Killing job $jobid for device $dev as ipconfig ran into recursion..."
kill -9 $jobid
fi
# if configuration of device worked we should have an assigned
# IP address, if so let's use the device as $DEVICE for later usage.
# simple and primitive approach which seems to work fine
if ifconfig $dev | grep -q 'inet.*addr:'
then
export DEVICE="$dev"
break
fi
done
else
for interface in ${DEVICE}; do
ipconfig -t "$ETHDEV_TIMEOUT" ${interface} | tee /netboot-${interface}.config
# squeeze
[ -e /tmp/net-${interface}.conf ] && . /tmp/net-${interface}.conf
# wheezy
[ -e /run/net-${interface}.conf ] && . /run/net-${interface}.conf
if [ "$IPV4ADDR" != "0.0.0.0" ]
then
break
fi
done
fi
for interface in ${DEVICE}
do
# source relevant ipconfig output
OLDHOSTNAME=${HOSTNAME}
# squeeze
[ -e /tmp/net-${interface}.conf ] && . /tmp/net-${interface}.conf
# wheezy
[ -e /run/net-${interface}.conf ] && . /run/net-${interface}.conf
[ -z ${HOSTNAME} ] && HOSTNAME=${OLDHOSTNAME}
export HOSTNAME
if [ -n "${interface}" ]
then
HWADDR="$(cat /sys/class/net/${interface}/address)"
fi
if [ ! -e "/etc/resolv.conf" ]
then
echo "Creating /etc/resolv.conf"
if [ -n "${DNSDOMAIN}" ]
then
echo "domain ${DNSDOMAIN}" > /etc/resolv.conf
echo "search ${DNSDOMAIN}" >> /etc/resolv.conf
fi
for i in ${IPV4DNS0} ${IPV4DNS1} ${IPV4DNS1}
do
if [ -n "$i" ] && [ "$i" != 0.0.0.0 ]
then
echo "nameserver $i" >> /etc/resolv.conf
fi
done
fi
# Check if we have a network device at all
if ! ls /sys/class/net/"$interface" > /dev/null 2>&1 && \
! ls /sys/class/net/eth0 > /dev/null 2>&1 && \
! ls /sys/class/net/wlan0 > /dev/null 2>&1 && \
! ls /sys/class/net/ath0 > /dev/null 2>&1 && \
! ls /sys/class/net/ra0 > /dev/null 2>&1
then
panic "No supported network device found, maybe a non-mainline driver is required."
fi
done
}
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